diff --git a/src/sparsemap.c b/src/sparsemap.c
index 4e2b826..a34ad6c 100644
--- a/src/sparsemap.c
+++ b/src/sparsemap.c
@@ -1279,29 +1279,12 @@ sparsemap_merge(sparsemap_t *map, sparsemap_t *other)
     if (src_start < dst_start || dst_count == 0) {
       __sm_chunk_t src_chunk;
       __sm_chunk_map_init(&src_chunk, src + sizeof(sm_idx_t));
-      uint8_t buf[sizeof(sm_idx_t) + sizeof(sm_bitvec_t) * 2] = { 0 };
       size_t src_size = __sm_chunk_map_get_size(&src_chunk);
-      size_t offset = src_start + (sizeof(sm_idx_t) + src_size);
-      __sm_insert_data(map, offset, &buf[0], sizeof(buf));
+      __sm_insert_data(map, src_start, src, src_size);
       *(sm_idx_t *)dst = src_start;
 
-      __sm_chunk_t dst_chunk;
-      __sm_chunk_map_init(&dst_chunk, dst + sizeof(sm_idx_t));
-
       /* Update the chunk count and data_used. */
       __sm_set_chunk_map_count(map, __sm_get_chunk_map_count(map) + 1);
-      if (other->m_data_used != 0) {
-        other->m_data_used += sizeof(sm_idx_t) + sizeof(sm_bitvec_t);
-      }
-      size_t capacity = __sm_chunk_map_get_capacity(&src_chunk);
-
-      /* Reduce the capacity of the source-chunk map. */
-      __sm_chunk_map_set_capacity(&dst_chunk, offset % capacity);
-
-      /*
-      uint8_t *src_data = __sm_get_chunk_map_data(other, src_start);
-      memcpy(&buf, src_data, src_size);
-      */
 
       /* Carry on to the next chunk. */
       src += sizeof(sm_idx_t) + __sm_chunk_map_get_size(&src_chunk);